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Question

A $4 \times 4$ digital image has pixel intensities ($U$) as shown in the figure. The number of pixels with $U \le 4$ is:
0102
4733
5544
6732

The correct answer is
11

Pixel Intensity Analysis for Digital Image

The problem asks us to count the number of pixels in a given $4 \times 4$ digital image whose intensity value ($U$) is less than or equal to 4. The pixel intensities are provided as:

0, 1, 0, 2, 4, 7, 3, 3, 5, 5, 4, 4, 6, 7, 3, 2

Identify Pixels Satisfying the Condition

We need to find pixels where the intensity '$U \le 4$'. Let's examine each pixel value:

  • 0: $0 \le 4$ (Yes)
  • 1: $1 \le 4$ (Yes)
  • 0: $0 \le 4$ (Yes)
  • 2: $2 \le 4$ (Yes)
  • 4: $4 \le 4$ (Yes)
  • 7: $7 \le 4$ (No)
  • 3: $3 \le 4$ (Yes)
  • 3: $3 \le 4$ (Yes)
  • 5: $5 \le 4$ (No)
  • 5: $5 \le 4$ (No)
  • 4: $4 \le 4$ (Yes)
  • 4: $4 \le 4$ (Yes)
  • 6: $6 \le 4$ (No)
  • 7: $7 \le 4$ (No)
  • 3: $3 \le 4$ (Yes)
  • 2: $2 \le 4$ (Yes)

Calculate Total Count

Count the number of pixels identified as satisfying the condition '$U \le 4$'.

The pixels satisfying the condition are: 0, 1, 0, 2, 4, 3, 3, 4, 4, 3, 2.

Total count = 11.

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Important Questions from Data Interpretation

  1. The table given below shows the earnings of two persons on five different days.

    Earnings
    Days PQ
    Monday105150
    Tuesday96110
    Wednesday65122
    Thursday115106
    Friday13068
    What is the ratio of total earnings of P to the total earnings of Q? 
  2. The table below shows the number of toys of 6 different colours sold from a shop during a given period. The table also shows the percentage of toys of each colour which are cars.

    ColourTotal toysPercentage of cars
    C150012
    C260015
    C340012.5
    C455010
    C565020
    C645010

    What is the total number of car toys of C2 and C3 taken together?

  3. Study the given graph carefully and answer the question that follows. The graph shows the demand and production of different companies.

    The ratio between the companies having more production than demand and more demand than production is:

  4. Study the given table and answer the question that follows. The given table shows the number of new employees added to different categories of employees in a company for four years and the number of employees from these categories who left the company every year.

     

    During the period between 2001 and 2004, the total number of Technicians who left the Company is what percentage (rounded off to the nearest integer) of the total number of Technicians who joined the Company?

  5. The given pie-chart shows the percentage distribution of 20,000 employees in a company. Study the given chart and answer the question that follows. If 30% of the employees in department D are females, then how many male employees are there in that department?

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